Harrow-tooth fastening.



UNrTnn STATES PATENT OFFICE.

GLENN T. IVILLIS AND JAMES PORTEOUS, OF FRESNO, CALIFORNIA; SAID VILLIS ASSIGNOR TO SAID PORTEO'US.

HARROW-TOOTH FASTENING.

SPECIFICATION forming part of Letters Patent No. 697,058, dated April 8, 1902.

Application filed September 9,1901. Serial No. 74,787. (No model.)

To @ZZ whom t may concern: that the under side of the vbar is subject to Be it known that we, GLENN T. VILLIS and decided wear, and especially in a revolving JAMES PORTEOUS, citizens of the United harrow where the frame-bars are of gas-pipe States, residing at Fresno, county of Fresno, the under surface continually rolling in the 5 State of California,haveinvented certain new sand gets so worn and the bar or pipe beand useful Improvements in Harrow-Tooth comes so thin that it will not hold the teeth. Fastenings; and We do hereby declare the fol- Obviously if such. great frictional wear falls lowing to be a full, clear, and exact descripon the under surface' of the bar or pipe the tion of the same. .Y lower arm of the clip passing and exposed 6o to Our invention relates to the class of deunder the bar will receive equal and even vices for securing or fastening barrow-teeth greater wear than the bar and will wear out to theircarryingbars. In securing strength, as soon, if not faster, than the bar or pipe, together with adaptability to be readily made and there will soon not be enough of the clip and broken for the removal of and the releft to hold the tooth, which will be lost in the I5 placing or substitution of teeth, the general field. By our present invention we avoid this style of fastening illustrated by Letters Patwear on the lower arm of the clip, thereby ent of the United States No. 670,071, Glenn preserving the strength and life of the fasten- T. Willis, March 19, 1901, has in practice ingand avoiding thelossof the tooth. In Fig. demonstrated the necessity of a further im- 2 it will be seen that the lower arm or mem- 7o zo provement-namely, avnovel arrangement of ber h of the clip instead of passing under the the clip relatively to the bar-which will rebar, as heretofore, passes through a slot a in suit in preventing wear of the lower arm of the bar. Thus the baralone receives the wear, the clip by Contact with the ground, thereby the clip being fully protected and preserving avoiding weakening of the fastening and the its full strength during the practical life of z5 consequent loss of the tooth. This is the obthe frame.

ject of our present invention, the nature of In a fastener of this type in which a clip is which will hereinafter fully appear by referused it is essential to get as much frictional ence to the accompanying drawings, in contact between the clip, the bar, and the whichtooth as possible in order to make asecure 8o 3o Figure l is a top view of our fastening. grip. It follows that the clip should have a Fig. 2 is a cross-section showing a single maximum height. Consequently the slot a clip, the lower arm of which passes through of the bar should be as low down as is con the carrying-bar. Fig. 3 is a cross-section sistent with the wear of the bar; butitisalso showing said clip so arranged and in addievident that whatever distance the slot is 35 tion thereto a second clip, the upper arm of from the bottom that distance must be dewhich passes through the har under the lower ducted from the bar in considering the twistarm of the rst clip. Figs. 4 and 5 are views ing strain on the harrow-tooth-that is to say, of the bars A of Figs. 2 and 3 to show slot a. if the slot Ct be punched one-quarter of an A is a portion of a harrow-bar. inch from the bottom that much should be 9o 4o B is a clip, having a top member or arm b added to the top of the bar and the barwould and alower memberor arm b. In these arms therefore be a quarter-inch wider in order are slots or holes b2 to receive the tooth O, to retain the same frictioual gripping-surface which being tapering and the holes h2 being for the parts and to be able to equally resist longer than the width of the cross-section of the twisting strain on the tooth. In any case, 45 the tooth will when driven down in said holes however, as the bottom of the bar would be wedge itself against the face of the bar and entirely exposed to the wear of the sand it at the same time will thereby tighten the clip will wear out in time and the Whole frame to the bar. of the harrow would have to be renewed. For

Heretofore the top arm of the clip has passed these reasons we prefer in order to secure the roo 5o over the top edge of the bar and the bottom best results of our invention to add to the arm has passed underit.. Practice has shown clip B a second clip, as shown in Fig. In

this the clip B has its lower arm passing through a slot ain the bar, as it does in Fig. 2; but the slot is higher up in the bar. In addition to this clip, which we may term the permanent or protected clip, there is a second clip D, the top arm dof which passes through slot a directly under the lower arm of clip B. Thebottom arm d of clipD passes under the bar, and the arms of clip D are provided with holes in alinement with those of clip B, so that the tapering tooth C passes through all the arms and by its wedging action clamps the parts together. This second clip D may be termed the replaceable or wearing clip. Now although the lower arm of the second clip D by rolling in the sand will finally wear out there will still be enough of the fastening left-to wit, the entire protected and uninjuredupper clip B- `to hold the tooth in place and preventit from being lost until a new wearing or second'clip `D can be put on, whereupon the harrow would be as good again as new. AIt is not the loss of the clip by wear'which is the most serious disadvantage, 4for that can be easily renewed.v The serious feature is the loss of the tooth, occasioned by the wear and weakening ot' the clip. Inboth forms shown-that in Fig. 2 and that in'Fig. S-the loss of the tooth is entirely guarded against, for the clip B, whether alone or iu conjunction with a seeond clip, is always protected against wear and willalways hold the tooth; but by the use of the second clip we are able to secure a maximum friction gripping-surface, thereby holding the tooth firmer and givingt he implement a decided advantage in hard or stony ground.

Having thus described the invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In combination with a barrow-tooth, and

a slotted carrying-bar for the same, a clip ing an upper and a lower arm extending beyond the plane of the opposite face of the bar, the lower arm passing through the slotted bar, both arms being provided with holes to receive the tooth.

2. In combination with a harrow-tooth and a slotted carrying-bar for the same, a clip bearing against one face of the bar, and having an upper arm passing over the top of the bar, and a lower -arm passing through the slotted bar, both arms being provided with holes to receive the tooth.

3. In combination with a harroW-tooth and a slotted carrying-bar for the same, a clip bearing against one face of the bar, and having an upper and a lower arm extending beyond the plane of the opposite face of the bar, the lower arm passing through the slotted bar, and a second clip bearing against the bar under the first clip, and having an upper and a lower arm extending beyond the plane of the opposite face of the bar, the upper arm of said second clip passing through the slotted bar, the arms of both clips being provided with holes to receive the tooth.

4L. In combination with a barrow-tooth, and a slotted carrying-bar for the same, a clip bearing against the upper portion of one face of the bar, and having an upper arm passing over the top of the bar, and a lower arm passing through the slotted bar, and a second clip bearing against the lower portion of one face of the bar, and having an upper arm passing thro ugh the slotted bar, and a lower arm passing under the bar, the arms of both clips having holes, to receive the tooth.

' In witness whereotwe have hereunto se our hands.

GLENN T. WILLIS. JAMES PORTEOUS.

Witnesses:

JAMES GALLAGHER, MILUs- K. HARRIS. 

